Clay Barrier
Mostrando 1-12 de 17 artigos, teses e dissertações.
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1. BIONANOCOMPÓSITOS POLIMÉRICOS À BASE DE MONTMORILLONITA – MATERIAIS DE INTERESSE CONTÍNUO
Polymeric bionanocomposites are versatile materials that have many practical applications. The wide use of these materials is mainly due to their structure and properties, which combine at nanometric scale, the functionality of biopolymers with the excellent stability of inorganic solids, such as the clay minerals family. Montmorillonite is the most widely e
Quím. Nova. Publicado em: 2020-12
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2. Analysis of Water Barrier, Mechanical and Thermal Properties of Nanocoposites Based on Cassava Starch and Natural Clay or Modified by Anionic Exchange
Biopolymer films have several industrial applications because they are environmentally sustainable. Cassava starch is a biopolymer that is easily available, but has limitations: it is hydrophilic, poorly resistant and degradable. The improvement of these properties was proposed in this research from the use of bentonite clay (BT) as a filling material. The c
Mat. Res.. Publicado em: 11/05/2017
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3. Gas permeability of bentonite barriers: development, construction and testing of a measurement system
Abstract This article proposes a testing device to quickly and reliably estimate the gas permeability of bentonite-based clay barriers used in landfill cover systems. The testing methodology is based on a transient gas flow regime that passes through the barrier, therefore not requiring the use of sophisticated equipment that aim to maintain constant differe
REM, Int. Eng. J.. Publicado em: 2016-12
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4. Thermal Decomposition of Polymer/Montmorillonite Nanocomposites Synthesized in situ on a Clay Surface
This paper reports the effect of the SWy-1 montmorillonite content on the kinetic thermal degradation of poly(2-hydroxyethyl methacrylate) (PHEMA)/SWy-1 nanocomposites prepared by in situ photopolymerization, using thermogravimetry analysis (TGA). 2-Hydroxyethyl methacrylate was photopolymerized in the presence of SWy-1 clay mineral using 2-hydroxy-3- (3,4-d
J. Braz. Chem. Soc.. Publicado em: 2016-02
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5. Giant Bamboo Fiber Reinforced Epoxy Composite in Multilayered Ballistic Armor
The ballistic performance of a multilayered armor with a front ceramic tile backed by a plate of giant bamboo fiber reinforced epoxy composite was assessed. The ceramic layer spalls the projectile, while the bamboo composite dissipates the remaining energy. Ballistic tests were performed with high velocity ammunition and the projectile penetration was evalua
Mat. Res.. Publicado em: 23/10/2015
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6. Nanocompósitios poliméricos biodegradáveis à base de poli(hidroxibutirato-co-hidroxivalerato)
In this work, poly(hydroxybutyrate-co-hydroxyvalerate) (PHBV) nanocomposites were prepared by melt intercalation process using 1, 3 and 5 wt% of different phyllosilicates ¿ montmorillonite (OMMT) and halloysite (HNT). The effect of the clay type and content, as well as the processing conditions and the modification with organosilanes on the morphology and t
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2012
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7. Avaliação das propriedades de barreira a gases de membranas obtidas a partir de dispersões aquosas à base de poliuretanos e argila / Evaluation of gas barrier properties of membranes obtained from aqueous dispersions based on polyuretnane and clay
Materiais nanoestruturados têm recebido destaque na comunidade científica, destacando-se, dentre eles, os nanocompósitos à base de polímeros e argila. Quando esses materiais são obtidos no estado líquido, ressalta-se também o uso de água em substituição a solventes orgânicos, devido a questões ambientais. Neste trabalho foram sintetizadas disper
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/03/2011
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8. Properties of extruded xanthan-starch-clay nanocomposite films
The aim of this work was to manufacture the biodegradable nanocomposite films by extrusion from different combinations of cassava starch, xanthan gum and nanoclays (sodium montmorillonite - MMT- Na) and to characterize them according to their microstructure, optical, mechanical and barrier properties. Films were manufactured from nine starch/xanthan/nanoclay
Brazilian Archives of Biology and Technology. Publicado em: 2011-12
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9. Nanocompósitos de argila montmorilonita, amido, gelatina, isolado protéico de soja e quitosana / Nanocomposites of montmorillonite clay, thermoplastic starch, gelatin, soy protein isolate and chitosan
Nanocomposites of maize starch, gelatin, soy protein isolate, chitosan and montmorillonite clay were developed for application in food packaging. To evaluate the effect of the sodium montmorillonite clay (MMT) and soy protein isolate (IPS) concentration in the mechanical properties and in the barrier of nanocomposites of maize starch and gelatin, it was adop
Publicado em: 2011
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10. Influência das propriedades físico-mecânicas e hídricas do solo na susceptibilidade a escorregamentos em vertente declivosa na Serra do Mar em Ubatuba, São Paulo / Influence of physical and mechanical properties of soil an hydro in susceptibility to landslides on steep slopes in the Serra do Mar, Ubatuba
The mass movements are natural phenomena of evolution of the slopes, but they cause great damage when being considered as a risk in one area if they have a vulnerability in the slope associated with human occupation or industry that brings risk population. The study area is located on the northern coast of São Paulo, Brazil. In the region of Serra do Mar, a
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 25/02/2010
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11. Effect of thermo-coupled processes on the behaviour of a clay barrier submitted to heating and hydration
O armazenamento de rejeitos altamente radioativos é ainda um problema em aberto na área de engenharia nuclear sendo os sítios geológicos ainda a opção mais favorável e naturalmente aquela que demanda maior conhecimento na área de geomecânica. A maioria dos projetos conceituais de armazenamento do lixo nuclear objetiva a alocação de cilindros que c
Anais da Academia Brasileira de Ciências. Publicado em: 2010-03
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12. Structure and mechanical properties of polyamide 6/Brazilian clay nanocomposites
Recent interest in polymer/organoclays nanocomposites systems is motivated by the possibility of achieving enhanced properties and added functionality at lower clay loading as compared to conventional micron size fillers. By adding montmorillonite clay to polyamide 6 increases the Young modulus, yield strength and also improves barrier properties. In this wo
Materials Research. Publicado em: 2009-06